Add request telemetry tracking for out-of-process Azure Functions' `HttpRequestData`

[stijnmoreels]

Is your feature request related to a problem? Please describe.
When tracking HTTP requests in HTTP triggered Azure Functions that run out-of-process, there is no HttpRequest available, only an HttpRequestData instance.

Describe the solution you'd like
Add a dedicated Azure Functions package that lets use track HTTP requests with Azure Functions' HttpRequestData.